02. Prime Number Checker

function solve(num) {
    let isPrime = "true";
    if (num < 2){
        isPrime = "false";
    }
    for (let i = 2; i * i <= num; i++) {
        if (num % i === 0)
            isPrime = "false";
    }
    console.log(isPrime);
}


Тарикатско решение:)

function solve(num) {

    console.log(num === 3 || num === 5 || num === 7 || num % 2 !== 0 && num % 3 !== 0 && num % 5 !== 0 && num % 7 !== 0);

}